Fossiliferous Limestone
Calcium Carbonate (CaCO3) with marine fossils
fossil
Category
Sedimentary (Fossilized Organic Matter)
Browse sedimentary (fossilized organic matter) specimens identified by the Rock Identifier community.
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Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Fossilized Shark Tooth (Basal Bone)
Otodus sp. (Mineralized Hydroxyapatite)
sedimentary
Amber
Succinite (C10H16O)
mineral
Mammoth Tooth
Mammuthus tooth
fossil
Green Moss Agate
Agate (Silicon Dioxide - SiO2 with inclusions of Manganese/Iron oxides)
mineral
Amber
Succiniferous fossil resin (C10H16O)
mineraloid
Red Sandstone with Reduction Spot
Quartzose Sandstone with a Leach/Reduction Spot
sedimentary
Fossil Shark Tooth
Odontaspididae (likely Carcharias sp.)
fossil
Fossil Shark Tooth
Carcharocles (Otodus) sp. or similar fossilized Chondrichthyes tooth
sedimentary
Amber
Succinate (Fossilized Tree Resin)
gemstone
Amber
Succinite (Fossilized Tree Resin)
mineraloid
Fossilized Brachiopod Shell / Mold
Phylum Brachiopoda (Fossilized organic matrix replaced by Silica/Calcite)
fossil
Knightia Fossil in Limestone
Knightia eocaena in micritic limestone
sedimentary
Anthracite Coal
Anthracite (Carbon-based organic sedimentary/metamorphic rock)
metamorphic
Fossil Coral
Phylum Cnidaria / Rugosa or Tabulata
fossil
Amber
Succinite (a specific high-quality amber from the Baltic)
Organic Mineraloid
Amber
Succinite (fossilized tree resin), C10H16O
Organic Gemstone
Septarian Nodule
Septarian Concretion (Calcite, Aragonite, and Limestone)
sedimentary
Mosasaur Tooth Fossil
Mosasaurid vertebrate fossil (Hydroxyapatite)
mineral
Possible fossilized ammonite or concretion
Indeterminate fossil specimen; possibly an ammonoid mold/cast in iron-rich sedimentary rock
fossil
Jasper (Petrified Wood variant)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Moss Agate
SiO2 (Cryptocrystalline Quartz)
gemstone
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide
mineral
Jasper (likely Brown or Brecciated)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Fossil Coral (Honeycomb Coral)
Favosites (extinct genus of Tabulate coral)
sedimentary
Amber
Succinate (Fossilized Tree Resin)
mineraloid
Fossilized Shark Tooth (Otodus obliquus)
Otodus obliquus (Mineralized Apatite / Bio-apatite)
fossil
Amber
Succinite (Fossilized Tree Resin)
mineraloid
Coal (most likely Bituminous or Anthracite)
Coal (organic sedimentary rock)
Sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Shark Tooth Fossil
Carcharodonta (order Lamniformes), likely Carcharias spp.
fossil
Petrified Wood with Lichen
Silicified Wood (SiO2) colonized by crustose lichens
fossil
Fossilized Echinoid / Sea Urchin Internal Mold
Echinoidea internal cast (steinkern)
fossil
Amber
Succinite (fossilized tree resin)
fossil
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary
Petrified Wood
Silicified Wood / Fossilized Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2-dominant)
fossil
Petrified Wood
Silicified Wood (SiO2)
mineral
Agatized Petrified Wood
Silicon Dioxide (SiO2) - Chalcedony pseudomorph after Wood
metamorphic
Petrified Wood / Fossilized Wood
Silicified Wood (Silicon Dioxide - SiO2)
fossil